The word lamenters is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 14
Highest Scoring Words With Friends™ Play In The Letters lamenters
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Seven Letter Word Alert: (37 words)
antlers, armlets, artsmen, earnest, eastern, elaters, enamels, enteral, eternal, laments, lateens, leaners, leanest, mantels, mantles, martens, meanest, melters, nearest, realest, relates, relents, remates, remelts, renames, rentals, reslant, resmelt, reteams, saltern, smarten, smelter, stealer, steamer, sterane, sternal, tramels